Company Zhiyu Wen created these great apps:
Spot It - Story Edition, 找不同(动物卡通系列)-Find differences: animal cartoon edition, Find differences: animal sports, Sharp eyes, 锐眼 Sharp Eyes, 儿童观察力 Kids observation, 历年高考英语真题, 历年高考语文真题, 历年高考文综真题, 历年高考理综真题, 历年高考文科数学真题, 历年高考理科数学真题, 汉字找不同, and others..